Mortgage Loans Held For Investment And Related Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Oct. 31, 2011	Apr. 30, 2011
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loan loss reserve as a percentage of mortgage loans	17.00%	16.10%
Percentage of mortgage loan portfolio consisting of borrowers from Florida, California and New York	52.00%
Loans held for investment	$ 201.1
In-substance foreclosures	$ 6.2	$ 7.7
HRB Bank Interest-Only Mortgage [Member]
Mortgage Loans Held For Investment And Related Assets [Line Items]
Percent of loans purchased	63.00%
Minimum Credit Score [Member]
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loan-to-value at origination in order to have internal risk rating of medium	80.00%
Minimum credit score to be given internal risk rating of low	700
Maximum Credit Score [Member]
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loan-to-value at origination in order to have internal risk rating of medium	80.00%
Maximum credit score to be given internal risk rating of medium	700